Transient surface tension in miscible liquids | Zendy

Laurent Lacaze | Zendy; P. Guénoun | Zendy; D. Beysens | Zendy; M. Delsanti | Zendy; Philippe Petitjeans | Zendy; Pascal Kurowski | Zendy

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Transient surface tension in miscible liquids

Author(s) -

Laurent Lacaze,

P. Guénoun,

D. Beysens,

M. Delsanti,

Philippe Petitjeans,

Pascal Kurowski

Publication year - 2010

Publication title -

physical review e

Language(s) - English

Resource type - Journals

eISSN - 1550-2376

pISSN - 1539-3755

DOI - 10.1103/physreve.82.041606

Subject(s) - surface tension , spinodal decomposition , transient (computer programming) , binary number , light scattering , isobutyric acid , materials science , thermodynamics , diffusion , surface (topology) , critical point (mathematics) , miscibility , scattering , mechanics , structure factor , phase (matter) , physics , optics , chemistry , condensed matter physics , mathematics , geometry , polymer , biochemistry , arithmetic , quantum mechanics , computer science , composite material , operating system

Evidence of the existence of a transient surface tension between two miscible fluid phases is given. This is done by making use of a density matched free of gravity perturbations, binary liquid of isobutyric acid and water, which presents a miscibility gap and is studied by light scattering. The experiment is performed very near the critical point of the binary liquid, where the diffusion of phases is extremely slow. The surface tension is deduced from the evolution of the structure factor obtained from low angle light scattering. The latter evolution is successfully analyzed in terms of a local equilibrium diffusive approach that makes explicit how the surface tension decreases with time.

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